broadwell, petraeus' biographer. petraeus' downfall started when kelly complained to the fbi that she was receiving e-mails from broadwell. multiple officials tell nbc news the e-mails led to the discovery of others between general petraeus and broadwell and were indicative of an extramarital affair. >> my first reaction was disbelief. >> petraeus' former spokesperson and served with him in iraq and spoke tine petraeus twice this weekend and said his former boss is remorseful. >> in his word he screwed up. >> reporter: senior law enforcement official told nbc news that fbi officials interviewed petraeus. today members of congress are asking why the fbi did not inform them or the president sooner. >> this is something that could have had an effect on national security. i think we should have been told. >> this comes as we are learning more about the days leading up to petraeus' resignation. house majority leader, eric cantor said he was tipped off about the situation, however the president first learned about the inci